/*
  RigExpertZeroII_UART.h - Library for easy work with RigExpert ZEROII.
  Created by RigExpert Ltd., May 24, 2022.
  Released into the public domain.
*/

#ifndef RigExpertZeroII_UART_h
#define RigExpertZeroII_UART_h
 
#include "SoftwareSerial.h"
#include "math.h"
#include "Arduino.h"

#define MAX_FQ 1000000000 // 1 GHz

enum ZeroII_Status{
  ZEROII_STATUS_BUSY_USB = 1,
  ZEROII_STATUS_BUSY_SPI,
  ZEROII_STATUS_BUSY_I2C,
  ZEROII_STATUS_BUSY_UART,
  ZEROII_STATUS_IDLE,
  ZEROII_STATUS_READY,
  ZEROII_STATUS_ERROR,
};

class RigExpertZeroII_UART
{
  public:
    RigExpertZeroII_UART(int RX_Pin, int TX_Pin);
	bool startZeroII();
	bool getFwVersion();
	unsigned char getMajorVersion();
	unsigned char getMinorVersion();
	unsigned char getHwRevision();
	unsigned long getSerialNumber();
	bool startMeasure(int32_t fq);
	double getR();
	double getRp();
	double getX();
	double getXp();
	double getSWR();
	double getRL();
	double getZ();
	double getPhase();
	double getRho();
	double getZ0();
	void setZ0(double Z0);
	
  private:
	bool computeSWR(double Z0, double R, double X);
	double computeZ (double R, double X);
	void computePhase (double R, double X);
	unsigned char getStatus();
	bool readRX();
	unsigned char crc8_buffer(const unsigned char *buf, long len);
	
	SoftwareSerial *m_ZERO;
	String m_inputBuffer;
	double m_Z0;
	double m_R;
	double m_X;
	double m_SWR;
	double m_RL;
	double m_Phase;
	double m_Rho;
	bool m_isInited;
	
	unsigned char m_majorVersion = 0;
	unsigned char m_minorVersion = 0;
	unsigned char m_hwRevision = 0;
	unsigned long m_serialNumber = 0;
	
	const char crc8_table[256] = {0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D, 0x70, 0x77, 0x7E, 0x79,
                                  0x6C, 0x6B, 0x62, 0x65, 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D, 0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
                                  0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD, 0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1,
                                  0xB4, 0xB3, 0xBA, 0xBD, 0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
                                  0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A, 0x27, 0x20, 0x29, 0x2E,
                                  0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A, 0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
                                  0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A, 0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF, 0xB8,
                                  0xAD, 0xAA, 0xA3, 0xA4, 0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
                                  0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44, 0x19, 0x1E, 0x17, 0x10,
                                  0x05, 0x02, 0x0B, 0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34, 0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B,
                                  0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63, 0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B, 0x06, 0x01, 0x08, 0x0F,
                                  0x1A, 0x1D, 0x14, 0x13, 0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
                                  0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3}; /* 8-bit table */
};

#endif
